Synthesis of 2-phenylthiazolidine derivatives as cardiotonic agents. I. 2-Phenylthiazolidine-3-thiocarboxamides.
作者:HIROYUKI NATE、YASUO SEKINE、YASUSHI HONMA、HIDEO NAKAI、HIROSHI WADA、MIKIO TAKEDA、HIDEO YABANA、TAKU NAGAO
DOI:10.1248/cpb.35.1953
日期:——
A series of novel 2-phenylthiazolidine-3-thiocarboxamides (II) was synthesized and tested for positive inotropic activity in the isolated guinea pig heart and in anesthetized dogs. Reaction of the benzaldehydes (VI, XI, XIV and XV) with cysteamine followed by treatment with isothiocyanates readily gave II. Structure-activity relationships were investigated by varying the structural parameters. N-Methyl-2 -phenylthiazolidine-3-thiocarboxamides having an ortho substituent such as a Me or OMe group exhibited significant positive inotropic action, which was not blocked by propranolol. Among the various ortho-alkoxyphenyl derivatives synthesized, the 2- (2- (3- (4-phenylpiperazino) propoxy) phenyl) derivative (I67) was found to exhibit more potent and longerlasting activity than amrinone without any significant effect on heart rate or blood pressure
一系列新型2-苯基噻唑烷-3-硫代氨基甲酸酯(II)被合成并测试了其在离体豚鼠心脏和麻醉犬中的正性肌力活性。苯甲醛(VI、XI、XIV和XV)与半胱胺反应后,再用异硫氰酸酯处理,即可得到II。通过改变结构参数来研究结构-活性关系。具有邻位取代基如Me或OMe的N-甲基-2-苯基噻唑烷-3-硫代氨基甲酸酯表现出显著的正性肌力作用,且该作用不受普萘洛尔阻断。在合成的各种邻位烷氧基苯基衍生物中,2-(2-(3-(4-苯基哌嗪)丙氧基)苯基)衍生物(I67)显示出比氨力农更强大且持久的活性,而对心率或血压无显著影响。